The Worcester Bosch 87161066100 Siphon is a genuine replacement component designed to safely collect and discharge condensate from your boiler’s heat exchanger and flue system. As condensing boilers operate, water vapour in the exhaust cools and condenses; the siphon ensures this acidic condensate is routed correctly into the condensate drain without allowing flue gases to escape back into the appliance. A healthy siphon helps maintain correct drainage, prevents blockages and supports efficient, trouble-free operation.

This siphon is compatible with Worcester Bosch Greenstar, Ri and Junior boiler series that specify part number 87161066100 in their parts documentation. To ensure correct fitment, always check the part number on your existing siphon or consult your boiler’s service information before installation, as condensate system designs may vary between models and layouts.

Supplied ready for installation, the 87161066100 Siphon connects directly with the boiler’s condensate outlet and drain pipework, integrating with the existing condensate route without modification when fitted by a qualified engineer. Choosing this genuine Worcester Bosch siphon helps restore reliable condensate management and supports safe, efficient boiler performance in compatible systems.